Air cooled wire drawing block



Nov. 15, 1955 c. o. BRUESTLE AIR COOLED WIRE DRAWING BLOCK Filed Feb. l2, 1955 e ma T w l 1 1 United States PatentO i AIR COOLED WIRE DRAWING BLOCK Carl O. Bruestle, Metuchen, N. J., assignor to Syncro Machine Company, Perth Amboy,` N. J., a corporation of New Jersey Application February 12, 1953, Serial No. 336,503

4 Claims. (Cl. 205-20) This invention relates to an air cooled wire drawing block. v

It is a fundamental object of the invention to provide a wire drawing block having a replaceable wearing surface, which block is characterized in part by the fact that the said wearing surface is placed so as to be directly cooled by a moving air stream.

Another object ofthe invention is to provide a block construction which will permit controlled cooling and ready replacement of wearing surfaces. l

Other objects and advantagesof the invention will in part be obvious and in part appear hereinafter.

The invention accordingly is embodied in a wire drawing block construction characterized by its being symmetrical about a central axis, the said central' vertical axis carrying the block formed of a pair of rings, so placed as to form a removable wearing surface near the base thereof to receive wire being taken from a die, the rings being arranged with a pair of annular passages for a current of air, one of said currents being directed over the wire as it accumulates on the drawing face of the block, the other of said passages being located beneath the wire as it accumulates on the block. The invention accordingly is embodied in the apparatus having the features of construction, combinations of elements and arrangement of parts hereinafter to be described in detail.

In the drawings:

Fig. l is a top plan view of a wire drawing block formed in accordance with the invention.

Fig. 2 is an axial section taken through a block which includes the piece shown in Fig. 1 and also the wearing surface mounted thereon and the deiiecting ring which is also mounted concentrically with the block.

Fig. 3 is a broken section showing in side elevation the formation of spacers on the principal central ring of the block.

Referring to Fig. l, represents the block itself which has acentral axis at 11 and a keyway 12 formed therein for aixing said block to the vertical axis of a drawing machine. The central portion of the hub 13 is cylindrical and is connected by ribs 14, 15, 16 and 17 to a skirt 18 to join further with the outer drum 19 of the cylinder itself.

The skirt 18 and drum 19 merge at a circumference in from that of the outer drum 19 by way of an inturned section 20 of said drum 19 to form what is essentially a third concentric cylinder 21 in the principal block. The outer face of the block 10 carries thereon a plurality of spacers or ridges 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36 and at right angles on the base thereof, it carries four other symmetrically placed enlarged ridges 40, 41, 42 and 43. All of the ridges extend down to a level 50 corresponding to the bottom level to which the said ridges extend around the skirt. These ridges are further formed with outwardly extending sections 51 thereby to define ledges or a common ledge on which the drawing ring can be mounted.

a 2,723,744 Ice Patented Nov. 15, 1955 The drawing ring 60 is cylindrical and has an inside diameter large enough to permit its being raised and lowered over the entire block. It is preferably a close fit around the outer edges of the ridges, so that when the ring is set in place, the lower edge rests on the ledges 51 defined at the stated points around the circumference of the structure. Keyways 61 are formed at two of these four points around the circumference of the structure and the wearing ring is held in place by being keyed to the central block, for example, by bolt 62.

This formation is shown in greater detail in Fig. 3 which constitutes a detailed elevation of the said block at the point where the keyway is formed in the member. Therein it will be seen that the ridges 32, 33 and 34 are shown and that the ridge 43 is formed to receive a key member and bolt 62 to hold the block in place. This structure is symmetrical around the axis and the corresponding details are found at the diametrically opposite ridge.

In Fig. 2, the vertical axis of the block may be considered the vertical axis of the machine and the block may be considered keyed in place at keyway 12. It will thus be seen that the structure being symmetrical about the axis will rotate thereabout and the drawing ring is so arranged as to rceive directly wire 70 coming from a drawing die. To cool the wire as it strikes the block and accordingly to provide conditions of drawing which will permit some regulation of the physical properties of the wire, the annular ring 71 is mounted on the base of the machine and oriented to be centered on the axis of the block. It is fastened in place by means of such connections as bolt 72. The upper edge of the ring is inwardly turned at 73 to define a bent or curved lip and thereby also to form a narrow annular passage 74 substantially at the level where the hot wire fresh from the die strikes the drawing face of the block.

In the base of the machine generally indicated at 80, provision is made by means of an inlet 81 for the passage of air or an air current directly over the wire as it is being drawn onto the block. It will be observed that in the operation, the block divides the air stream into a stream designated by the arrow A, which passes between the collar 71 and the ring 60 of the device and is deflected toward the wire substantially at the point where it iirst strikes the wearing block or ring on the machine. Thereupon the current continues in its upward trend and is deflected bythe remainder of the wire which may be accumulated on the ring into an upward direction. The stream of air is divided as indicated into a second stream B which passes between the skirt 21 and the drawing ring 60 to run between ridges enclosed within the annular space deiined by the face of the drawing ring 60 and the skirt 21. These ridges are of somewhat extended size due to the reduced diameter of the skirt 21 and the air stream B passes up past the ridges and is directed up over the face of the block onto and into the mass of accumulated wire, which may be above the level of the drawing ring itself, where it mingles with air from the stream A. The presence of the extended ridges between the skirt 21 and the ring 60 has the effect of taking heat by conduction from the relatively hot wire freshly accumulated from the dies and transferring that heat to the moving current of the air which in turn carries it up and out of the apparatus.

A dual advantage is developed by employing a wire block construction having the features shown in the drawing in that effective air cooling of the wire is obtained and, because of the division of the air into a plurality of streams to accomplish the cooling, it is more rapidly done and with economy in the amount of air consumed. It is also to be noted that the size of the ring 60 is such that the simple act of disconnecting the screws holding the ring and removing it when it becomes worn obviates the necessity of taking off and replacing the entire block as is done in conventional structures when the block becomes too worn. That is, the drawing face in the instant case is not only sturdy but is made removable to permit eflcient use and removal of the worn block. Also, this structure permits the use of different materials of a wear resistant nature for the facing.

Although the invention has been described only with a single embodiment, it is to be understood that variations thereof may be practiced without departing from the spirit o r scope of the invention.

What is claimed is:

1. A drawing block for wire drawing machines which comprises a block symmetrical about a vertical diameter having thereon a lower section of lesser diameter than that of the block, ridges on said block extending substantially from the bottom to the top thereof, the said ridges being of greater radial height in the bottom section where they are in contact with the section of lesser diameter, and a removable wearing ring mounted on said block, characterized by its having an extended skirt, the inner diameter of said skirt section being larger than the outer diameter of the block.

2. The apparatus in accordance with claim 1, in which the block is additionally oriented with respect to a concentric ring to deect the ow of air over wire passing onto said block.

3. A drawing block for wire drawing apparatus characterized by its being formed symmetrical about a vertical axis with a plurality of cylindrical sections vertically arranged thereon, a main section thereof consisting of two cylinders of different diameters, and a wearing surface comprising a second pair of cylinders of different diameters, but of a height sufficient to cover the cylindrical section of lesser diameter of the main block, and ridges formed on said main block and extending thereover from the section of larger diameter through the section of smaller diameter.

4. An apparatus in accordance with claim 3, in which the cylindrical section constituting a wearing surface is keyed to the main block and is formed on a diameter just large enough to fit over said main block, thereby being removable therefrom.

References Cited in the tile of this patent UNITED STATES PATENTS 346,709 Benbow Aug. 3, 1886 1,675,822 Pushalski July 3, 1928 1,712,348 Howe May 7, 1929 1,828,922 Carroll Oct. 27, 1931 2,207,739 Jordan July 16, 1940 2,215,235 Tubbs Sept. 17, 1940 2,241,956 Nye May 13, 1941 2,262,247 Nye Nov. 11, 1941 2,267,564 Mcllvried Dec. 23, 1941 2,481,944 Nye Sept. 13, 1949 2,554,468 Mayner May 22, 1951 

